8: The Mormon Proposition, a documentary exploring the role of the LDS Church in the passage of Proposition 8, will make its world premiere at the Sundance Film Festival, deep in the Mormon heartland. From the Salt Lake Tribute:

“We’re bringing the pain of this home,” said Reed Cowan, who directed “8: The Mormon Proposition,” which will have its world premiere next month in Park City at the Sundance Film Festival.

Cowan’s documentary is one of more than 50 titles announced Dec. 3 in the festival’s non-competitive slate.

“It’s really well done, and it’s really thorough,” festival director John Cooper said. “[Cowan] goes very deep, into the Mormon Church and its relationship to the anti-gay-marriage movement, all the way back almost before it really started, all the way back to the ’90s.”

The movie chronicles the 2008 campaign for Prop. 8, which overturned a court decision to allow same-sex marriage in California. In the film, Cowan tracks the LDS Church’s involvement with the Yes on 8 forces — and reveals what the film’s producer/editor Steven Greenstreet calls “an orchestrated strategic campaign” by the church to pass similar ballot measures in other states over the past two decades.

The LDS Church had no comment on the film, a spokesman said Thursday.

The trailer for the film is below.